How do I install the window hose correctly?

Feed the window hose through the window and attach the threaded adaptor from the outside. Clip the hose to the back of the air cooling unit, taking care to avoid any bends or kinks, as these could cause the pipe to clog and result in overheating or malfunction. Only use the hose provided with the unit and do not attempt to attach other hoses to extend the length. (Page 9-10)